Chemical Engineering MCQs

Page No. 166

Viscosity of water is about _____________ times that of air at room temperature?


a15

✖


b55

✓


c155

✖


d1050

✖


View Answer 55

A hydraulic ram acts as a/an ______________ pump?


aCentrifugal

✖


bReciprocating

✖


cImpulse

✓


dParallel cylinder

✖


View Answer Impulse

In fluid flow, the stagnation point is defined as a point, where the _____________ is zero?


aFlow velocity

✓


bPressure

✖


cTotal energy

✖


dAll A., B. and C.

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View Answer Flow velocity

During ageing of fluid carrying pipes, the__________________?


aPipe becomes smoother with use

✖


bFriction factor increases linearly with time

✖


cAbsolute roughness decreases with time

✖


dAbsolute roughness increases linearly with time

✓



Creeping flow around a sphere is defined, when particle Reynolds number is___________________?


a< 2100

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b< 0.1

✓


c> 2.5

✖


d< 500

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View Answer < 0.1

Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?


aSmall differential

✓


bAtmospheric

✖


cAbsolute

✖


dGage

✖


View Answer Small differential

Which is not a variable head meter _________________?


aVenturimeter

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bPitot tube

✖


cRotameter

✓


dNone of these

✖


View Answer Rotameter

Power requirement of fans having constant wheel diameter varies _____________ fan speed?


aAs square of

✖


bDirectly as

✖


cAs cube of

✓


dNone of these

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View Answer As cube of

For a reciprocating pump, the indicator diagram is the graph between the________________?


aDischarge and overall efficiency

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bVolume swept by piston for one complete revolution and the pressure in the cylinder

✓


cAngle swept by the crank pin at any instant and the discharge

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dNone of these

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Efficiency of power transmission (ε) through a circular pipe is given by (ht – hf)/ht, which has a maximum value of _____________ percent?


a33:3

✖


b50

✖


c66.6

✓


d88.8

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View Answer 66.6

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